摘要
为了提高城镇污水厂活性污泥工艺中氨氮去除效率,以沧州市城区市政污水实测数据为对象,开展实验测试分析。实验研究了硫化物和活性污泥厌氧接触时间不同对氨氮去除率的影响,探讨利用曝气消除硫化物影响的特征进行工艺调整的措施。实验研究了不同污泥质量浓度、水温和硫化物质量浓度下污水处理厂的活性污泥氨氮降解速率的变化。结果表明:污泥质量浓度降低可显著降低活性污泥对硫化物毒性的耐受性。当硫化物质量浓度高于50mg·L^(-1)时,氨氮降解速率显著降低,且随着质量浓度不断增高,速率不断下降。但当水温较低时,硫化物更易引起出水氨氮超标。该研究对提高沧州市城区市政污水的净化效果和居民用水质量具有很好的实际应用意义。
In order to improve the removal efficiency of ammonia nitrogen in the activated sludge process of urban sewage treatment plant,the measured data of municipal sewage in Cangzhou city were taken as the object to carry out experimental test and analysis.The effects of different anaerobic contact time between sulfide and activated sludge on the removal rate of ammonia nitrogen were studied experimentally,and the measures of process adjustment were discussed based on the characteristics of removing sulfide by aeration.The degradation rate of ammonia nitrogen in activated sludge of sewage treatment plant was studied under different sludge mass concentration,water temperature and sulfide mass concentration.The results showed that the tolerance of activated sludge to sulfide toxicity was significantly reduced by reducing the sludge mass concentration.When the sulfide mass concentration was higher than 50 mg·L^(-1),the degradation rate of ammonia decreased significantly,and the rate decreased with the increasing of the sulfide mass concentration.However,when the water temperature was low,sulfur compounds were more likely to cause excessive ammonia nitrogen in the effluent.The study has very good practical significance for improving the purification effect of municipal sewage and the quality of residential water in Cangzhou city.
作者
刘素婷
LIU Su-ting(Cangzhou Water Supply and Drainage Group Co.,Ltd.,Cangzhou 061000,China)
出处
《当代化工》
CAS
2021年第10期2394-2397,共4页
Contemporary Chemical Industry
基金
河北省沧州市重点研发计划指导项目(项目编号:192107001)。
关键词
城镇污水
安全处理
硫化物
氨氮降解速率
实验分析
Urban sewage
Safety handling
Sulphide
Ammonia nitrogen degradation rate
Experimental analysis
